1.
Which radiation produces the largest number of spectral lines?
2.
The graph of KE vs frequency in photoelectric effect is a straight line because:
4.
Continuous spectrum is obtained when:
5.
Which one forms a continuous spectrum?
6.
Dark lines in absorption spectrum occur because:
7.
Absorption spectrum is produced when light passes through:
8.
Continuous spectrum lacks:
9.
Absorption spectrum contains:
10.
In photoelectric effect, the graph of KE vs intensity is:
11.
Continuous spectrum of VIBGYOR is produced when:
12.
Which radiation is not seen in visible spectrum?
13.
The photoelectric effect fails when:
14.
Which colour has maximum wavelength in visible spectrum?
15.
Which is true for absorption spectrum?
16.
An absorption spectrum is the inverse of:
17.
A cool gas in front of a hot source gives:
18.
A hydrogen discharge tube produces:
19.
Emission spectrum lines originate due to:
20.
Dark lines in the solar spectrum are called:
21.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
22.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
23.
A hot glowing gas produces what type of spectrum?
24.
The spectrum produced by a glowing tungsten filament is:
25.
Band spectrum is usually produced by:
26.
Emission spectrum shows:
27.
Which of the following produces absorption spectrum?
28.
A cool gas in front of a hot source produces dark lines because:
29.
The slope of KE vs frequency graph in photoelectric effect gives:
30.
Emission spectrum occurs when electrons:
31.
Which region of EM spectrum shows maximum absorption lines in molecules?
32.
Spectrum is defined as:
33.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
34.
The threshold frequency depends on:
35.
Which instrument disperses light into its component wavelengths?
36.
Continuous spectrum merges because:
37.
A spectrograph containing prism splits light due to:
38.
Line spectra are observed in which state?
39.
Emission spectrum is produced when atoms:
40.
Which spectrum is unique for each element?
41.
Which property distinguishes absorption and emission spectral lines?
42.
Line spectra are due to:
43.
Spectroscope is used to:
44.
Continuous spectrum from the sun is due to:
45.
Emission spectrum appears due to:
